/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.graal.hotspot.logging;

import java.util.*;

public final class ProxyUtil {

    public static Class<?>[] getAllInterfaces(Class<?> clazz) {
        HashSet<Class<?>> interfaces = new HashSet<>();
        getAllInterfaces(clazz, interfaces);
        return interfaces.toArray(new Class<?>[interfaces.size()]);
    }

    private static void getAllInterfaces(Class<?> clazz, HashSet<Class<?>> interfaces) {
        for (Class<?> iface : clazz.getInterfaces()) {
            if (!interfaces.contains(iface)) {
                interfaces.add(iface);
                getAllInterfaces(iface, interfaces);
            }
        }
        if (clazz.getSuperclass() != null) {
            getAllInterfaces(clazz.getSuperclass(), interfaces);
        }
    }
}
